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From: Qais Yousef <qais.yousef@arm.com>
To: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ingo Molnar <mingo@redhat.com>,
	Russell King <linux@armlinux.org.uk>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [PATCH v7 2/2] ARM: ftrace: Add MODULE_PLTS support
Date: Fri, 12 Mar 2021 17:24:01 +0000	[thread overview]
Message-ID: <20210312172401.36awjh4hmj4cs6ot@e107158-lin.cambridge.arm.com> (raw)
In-Reply-To: <e726be33-bc03-0515-f430-c5a34ebc3619@nokia.com>

Hi Alexander

On 03/10/21 18:17, Alexander Sverdlin wrote:
> Hi!
> 
> On 10/03/2021 17:14, Florian Fainelli wrote:
> >>>>> I tried on 5.12-rc2 and 5.11 but couldn't reproduce the problem using your
> >>> I still can't reproduce on 5.12-rc2.
> >>>
> >>> I do have CONFIG_ARM_MODULE_PLTS=y. Do you need to do something else after
> >>> loading the module? I tried starting ftrace, but maybe there's a particular
> >>> combination required?
> >> You need to load a BIG module, so big that it has no place in the modules area
> >> any more and goes to vmalloc area.
> > You absolutely need a very big module maybe more than one. When I tested
> > this, I could use the two proprietary modules (*sigh*) that I needed to
> > exercise against and loading one but not the other was not enough to
> > make the second module loading spill into vmalloc space.
> 
> Here is what I use instead of these real world "proprietary" modules (which of course
> were the real trigger for the patch):
> 
> https://www.spinics.net/lists/arm-kernel/msg878599.html

I am testing with your module. I can't reproduce the problem you describe with
it as I stated.

I will try to spend more time on it on the weekend.

Thanks

--
Qais Yousef

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  reply	other threads:[~2021-03-12 17:25 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-27 11:09 [PATCH v7 0/2] ARM: Implement MODULE_PLT support in FTRACE Alexander A Sverdlin
2021-01-27 11:09 ` [PATCH v7 1/2] ARM: PLT: Move struct plt_entries definition to header Alexander A Sverdlin
2021-01-27 20:25   ` Florian Fainelli
2021-01-27 11:09 ` [PATCH v7 2/2] ARM: ftrace: Add MODULE_PLTS support Alexander A Sverdlin
2021-01-27 19:36   ` Florian Fainelli
2021-03-07 17:26   ` Qais Yousef
2021-03-08  7:58     ` Alexander Sverdlin
2021-03-09 17:42       ` Qais Yousef
2021-03-10  7:23         ` Alexander Sverdlin
2021-03-10 16:14           ` Florian Fainelli
2021-03-10 17:17             ` Alexander Sverdlin
2021-03-12 17:24               ` Qais Yousef [this message]
2021-03-12 18:35                 ` Florian Fainelli
2021-03-14 22:02                   ` Qais Yousef
2021-03-21 19:06                     ` Qais Yousef
2021-03-22 15:01                       ` Steven Rostedt
2021-03-22 16:32                         ` Qais Yousef
2021-03-22 17:02                           ` Alexander Sverdlin
2021-03-23 22:22                             ` Qais Yousef
2021-03-24  3:37                               ` Florian Fainelli
2021-03-24 16:10                                 ` Qais Yousef
2021-03-24  9:04                               ` Alexander Sverdlin
2021-03-24 15:57                                 ` Qais Yousef
2021-03-24 16:33                                   ` Alexander Sverdlin
2021-03-24 16:46                                     ` Qais Yousef
2021-03-15  9:19                   ` Alexander Sverdlin
2021-02-03 18:23 ` [PATCH v7 0/2] ARM: Implement MODULE_PLT support in FTRACE Florian Fainelli
2021-02-15 18:31   ` Ard Biesheuvel
2021-03-02  8:29     ` Linus Walleij
2021-03-02 10:00       ` Alexander Sverdlin

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